Sterling QVSF User Manual download pdf (Page 14)

INSTALLATION - VENTING

NOTICE: Combustion and exhaust venting

instructions below describe two-pipe venting. If

venting concentrically, a Concentric Vent Kit is

required and instructions included in the kit should

be followed.

COMBUSTION AIR VENTING AND PIPING

Never operate unit heaters

without combustion air and flue gas piping in

place or severe personal injury or death may

occur!

CARBON MONOXIDE!

Your venting system must not be blocked by

any snow, snow drifts, or any foreign matter.

Inspect your venting system to ensure adequate

ventilation exists at all times! Failure to heed

these warnings could result in Carbon Monoxide

Poisoning (symptoms include grogginess,

lethargy, inappropriate tiredness, or flu-like

symptoms).

1. The combustion air system installation must be

in accordance with the current National Fuel Gas

Code-NFPA 54 or ANSI Z223.1 National Fuel Gas

Code. In Canada, installation must be in accordance

with CSA-B149.1 “Installation Code for Natural Gas

Burning Appliances and Equipment” and CSA-B149.2

“Installation Code for Propane Burning Appliances

and Equipment”.

2. A Breidert Type L or Fields inlet cap, furnished by the

customer, must be installed at the termination point

of the combustion air system, Figures 10 & 11.

NOTICE: The top of the inlet cap is to be no less than

12 inches (305mm) from the top of the vent cap, see

Figures 10 & 11.

3. Each unit heater MUST have it’s own combustion

air system. It MUST NOT be connected to other air

intake systems.

4. Use single wall pipe constructed of 26-gauge

galvanized steel or a material of equivalent durability

and corrosion resistance for the combustion air

system.

Never use pipe of a diameter

other than that speciﬁ ed in Table 1, page 4! Never

use PVC, ABS or any other non-metallic pipe for

venting! To do so may result in serious damage

to the unit and or severe personal injury or death!

5. Long runs of single wall combustion air piping

passing through an unheated space may require

insulating if condensation becomes noticeable.

6. The combustion air system must be installed to

prevent collection of condensate. Pitch horizontal

pipes downward 1/4 inch per foot (21mm/m) toward

the inlet cap to facilitate drainage. Vertical combustion

air pipes should be piped as depicted in Figure 10.

The equivalent length of the vent system must not be

less than 5 feet and must not exceed 50 feet (15.2m).

Equivalent length equals the total length of straight

pipe plus 10 feet (4.6m) for each 90° elbow and 5 feet

(1.5m) for each 45° elbow.

NOTICE: For optimum performance keep the com-

bustion air system as straight as possible.

8. Each slip joint must be secured with at least three

corrosion resistant screws. Two full turns of 3M #425

Aluminum Foil Tape or its equivalent must then be

used to seal each joint. General Electric RTV-108,

Dow-Corning RTV-732 or an equivalent may be used

instead of the tape.

9. For horizontal combustion air systems longer than

5 feet (1.5m), the system must be supported from

overhead building structures at 3 foot (1m) intervals.

EXHAUST VENTING

Never operate unit heaters without

combustion air and ﬂ ue gas piping in place or

severe personal injury or death may occur!

1. Vent system installation must be in accordance with

the current National Fuel Gas Code-NFPA 54 or

ANSI Z223.1 National Fuel Gas Code. In Canada

installation must be in accordance with CSA-B149.1

“Installation Code for Natural Gas Burning

Appliances and Equipment” and CSA-B149.2.

“Installation Code for Propane Burning Appliances

and Equipment”.

2. A Breidert Type L or Fields vent cap, furnished by the

customer, must be installed at the termination point

of the vent system, Figures 10 & 11.

3. Each unit heater MUST have it’s own vent system. It

MUST NOT be connected to other vent systems or

to a chimney.

4. Use single wall pipe constructed of 26 GA galvanized

steel or a material of equivalent durability and

corrosion resistance for the vent system. For

installations in Canada, use corrosion resistant

and gas-tight, listed vent pipe conforming with local

building codes, or in the absence of local building

codes, with current CSA-B149.1, Installation Codes

for Natural Gas Burning Appliances and Equipment

or CSA-B149.2, Installation Codes for Propane Gas

Burning Appliances and Equipment.

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Sterling QVSF User Manual Page 14

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